The term turbine wake refers to the low momentum and highly turbulent region located downstream of an operating wind turbine, which is a direct consequence of the extraction of kinetic energy from the incoming wind field. Significant power losses [1]}, [2]}, [3]} and enhanced fatigue loads [4]}, [5]} were documented for turbines impinged by upstream wakes. The study of turbine wakes through numerical simulations is encumbered with difficulties due to the high Reynolds number flow (which entails a great span of length and time scales involved) [6]}, the unsteadiness of the inflow conditions [7]}, [8]}, and the relevant role of atmospheric stability [9]}. Recently, large-eddy simulations (LES) have become a well-established tool for the simulation of wind farm flows [10]}, [11]}, [12]}. However, their computational costs are still prohibitive for large scale tasks, such as for layout optimization and real-time performance diagnostics.
